參數(shù)資料
型號: 5962R0722402VYC
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PQFP256
封裝: QFP-256
文件頁數(shù): 124/155頁
文件大?。?/td> 4139K
代理商: 5962R0722402VYC
70
7703D–AERO–12/09
AT697F PRELIMINARY INFORMATION
PR
ELI
MINA
R
Y
IN
FOR
M
AT
IO
N
Figure 44. TAP - State Machine
Test Logic Reset
Run Test/Idle
Select DR Scan
Select IR Scan
Capture DR
[1]
Shift DR
Exit_1 DR
Pause DR
Exit_2 DR
Update DR
[1]
Capture IR
Shift IR
Exit_1 IR
Pause IR
Exit_2 IR
Update IR
1
0
1
0
00
11
1
00
0
11
1
11
00
11
00
Transitions between
states are controlled
by TMS input value.
Due to the scan cell layout, "Capture DR" and "Update DR" are states without associated action
during the scanning of internal chains.
TAP Instructions
The following instruction are supported by the AT697 TAP.
Table 25. TAP instruction set
Binary Value
Instruction Name
Data Register
Scan Chain Accessed
000
EXTEST
Boundary scan register
Boundary scan chain
001
SAMPLE/PRELOAD
Boundary scan register
Boundary scan chain
010
BYPASS
Bypass register
Bypassscan chain
111
IDCODE
Device id register
ID register scan chain
BYPASS
This instruction is binary coded "010"
It is used to speed up shifting at board level through components that are not to be activated.
EXTEST
This instruction is binary coded "000"
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